fix naming of _WSTATUS macro from wait.h
fix naming of _WSTATUS macro from wait.h

cactorium/libc,zethra/libc,anatol/libc,rust-lang/libc,mneumann/libc,superriva/libc,philippkeller/libc,mneumann/libc,rust-lang-nursery/libc,superriva/libc,zethra/libc,rust-lang/libc,philippkeller/libc,rust-lang-nursery/libc,rust-lang/libc,cactorium/libc,mneumann/libc,anatol/libc,superriva/libc,anatol/libc,zethra/libc,philippkeller/libc,cactorium/libc,rust-lang-nursery/libc